With Flexible Braided Shield Cables, Quad Shield offers the Maximum amount of Shielding Integrity in comparison to Single, Dual or Triple Shields. Quad Shield RG6 would denote alternating Aluminum Foil and Aluminum Braided Shield Layers, starting with the Bonded Foil Layer around the Foam Dialectric (which encases and supports the Center Conductor), with the better Quad Shield having 2 Layers of Braided Aluminum Shield, one of 60% and the 2nd at 40%. The Physicality of the Density of the Braid and Foil is truly a formidable Barrier to Ingress and Egress of Signals, but is only half of the equation. To sink ambient signals that are attracted to the shield, a connection to a good Ground is a must, long Drops should have such a connection at both ends.